Goulds Pumps 3355 - IOM - Manual (Page 54)

Troubleshooting
Symptom Cause Remedy
There are leaks at the shaft seal. The shaft seal is worn. Replace the mechanical seal.
Check the sealing, flushing, and cooling
pipes (pressure).
Do not run the pump dry.
There are deposits on the mechanical Clean the mechanical seal.
seal.
Replace the mechanical seal if neces-
sary.
Provide additional rinsing or quench if
necessary.
The impeller is out of balance. Remove any blocks or deposits.
Replace the impeller is it is broken or
unevenly worn.
Check the shafts to make sure that they
are running true.
The coupling is not aligned. Align the pump.
The coupling distance is too small. Correct this.
Forces in the pipeline are too high and the Change the position of the support pipes
pump unit is under strain.
and use compensators.
Check that the foundation plate and frame
are properly cast and in place.
There is not enough sealing. Tighten the screws.
Replace the mechanical seal.
52 Model 3355 Installation, Operation, and Maintenance Manual